CT number definition

被引：32

作者：

Bryant, J. A. ^{[1
]}

Drage, N. A. ^{[1
]}

Richmond, S. ^{[1
]}

机构：

[1] Cardiff Univ, Sch Dent, Cardiff CF14 4XY, S Glam, Wales

来源：

RADIATION PHYSICS AND CHEMISTRY | 2012年 / 81卷 / 04期

关键词：

CT; X-ray physics; 3D imaging; CONE-BEAM CT; RECONSTRUCTION;

D O I：

10.1016/j.radphyschem.2011.12.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The accuracy of CT number plots has been found lacking in several medical applications. This is of concern since the ability to compare and evaluate results on a reproducible and standard basis is essential to long term development. Apart from the technical limitations arising from the CT scanner and the data treatment, there are fundamental issues with the definition of the Hounsfield number, namely the absence of a standard photon energy and the need to specify the attenuation mechanism for standard measurements. This paper presents calculations to demonstrate the shortcomings of the present definition with a brief discussion. The remedy is straightforward, but probably of long duration as it would require an international agreement. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：358 / 361

页数：4

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